Improvement in grates



UNITED STATES PATENT OFFICE.

WM. J. TOWNE, OF NEWTON, MASSACHUSETTS.

IMPROVEMENT |N eRATEs.

Speciiication forming part of Letters Patent No. 48,000, dated May 30,1865.

To a/ZZ whom it may concern:

Be it known that I, WILLIAM J. ToWNE, of Newton, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Grates for Stoves, Furnaces, Snc., of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, making l part of this specification, inWhich- Figure 1 is a plan of my improved grate. Fig. 2 isalongitudinalvertical section through the same on the line m x of Fig.l. Fig. 3 is a transverse vertical section through the same on the liney y of Fig. 1.

Various descriptions of gratos have been constructedhaving both arectilinear horizontal and a rocking vertical movement, so as to allowof the ashes being shaken out and the coal dumped77 Whenrequired. Thefriction upon the journals of these grates, and in some cases betweenthe grate and theframe in which it is placed, however, frequentlyrenders it difficult to shake them in the direction of their length.

My invention has for its obj ect to overcome these difficulties; anditconsists in suspending the journals of the grate upon rollers, by whichmeans the friction is greatly reduced and the operation of shaking thegrate in the direction of its length much facilitated.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents the reif chamber, from the interiorof which projects a iange or plate, a, which forms a frame for the grateB, the journals b of which pass through enlargements c on the iiange aand rest on rollers d. which revolve on pins passing through lugs e,cast on the bottom of the flange a, by `Whicharrangement the friction onthe journals b is greatly reduced, and the grate can be moved back andforth in the direction of its length, to shake out the ashes, with muchgreater ease than heretofore. The grate is dumped in the ordinary mannerby means of a lever, g, adapted to the outer end,f, of one of thejournals b, and it is moved back and forth in the direction of itslength, to shake out the ashes, by means of the same lever, g, one endof which is passed through a slot in the hre-chamber into a notch in thegrate made WVM. J. TOWNE.

Witnesses:

P. E. TEscHEMAoHER, N. W. STEARNs.

